: a plant of the genus Podostemon
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/riv"euhr weed'/, n.
any of several chiefly tropical submerged aquatic plants of the genus Podostemum and related genera, growing in rapidly moving streams.
[1665-75; RIVER1 + WEED1]
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rivˈerweed noun
Any plant of the genus Podostemon
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Main Entry: ↑river
Useful english dictionary. 2012.